This document summarizes information about GST registration including: - Registration requires a 15-digit Goods and Service Tax Identification Number (GSTIN) based on PAN. - Applications received on the GST portal will be sent to the relevant state authority to examine documents within 3 days. Registration certificates will be issued within 3 days if the application is in order. - Existing taxpayers registered under both central and state taxes or just one will need to fill remaining information on the GST portal. - Taxpayers can surrender their registration if their business closes, annual turnover falls below the threshold, or their business is transferred, demerged or amalgamated with another legal entity.